Watson is back from her trip to Denmark. She notices that Sherlock has Kitty running all sorts of errands and advises Kitty to not always be at Sherlock's beck and call. Sherlock sends Kitty to investigate a robbery at the 39th Street Library. But it turns out more than a rare map was stolen, but a guard was also killed. Sherlock quickly identifies the thief, Stuart Zupko, but when the police go to arrest him, they find him dead. The Bray Map is still there, but Sherlock says it is a forgery. The Bray map is part of a larger atlas, the Smythe's Virginia, which has been sold to an anoymous buyer. Sherlock and Joan go to the law firm that handled the sale and meet with the buyer, Martin Hull, a real estate magnate. He offers to hire them to find the map. Sherlock declines by walking out of the meeting. He knows the real value isn't the map itself, but what's on the map. What information is on the map that is worth two people's lives? Who has the original map? Find out the answers when you watch Elementary Season 3 Episode 6 onlinve via TV Fanatic.